Acts 19:1-6 is a very interesting scripture. Here we have "disciples" that believed in the Messiah (in the future tense) but apparently had no knowledge of Jesus' death, burial, and resurrection and had not received the Holy Spirit. 19:1 While Apollos was at Corinth, Paul took the road through the interior and arrived at Ephesus. There he found some disciples 2 and asked them, “Did you receive the Holy Spirit when you believed?” They answered, “No, we have not even heard that there is a Holy Spirit.” 3 So Paul asked, “Then what baptism did you receive?” "John’s baptism,” they replied. 4 Paul said, “John’s baptism was a baptism of repentance. He told the people to believe in the one coming after him, that is, in Jesus.” 5 On hearing this, they were baptized in the name of the Lord Jesus. 6 When Paul placed his hands on them, the Holy Spirit came on them, and they spoke in tongues and prophesied. They were baptized by John the Baptist, the baptism of repentance (in other words they had repented of their unbelief in a coming Messiah), but they probably didn't know about Jesus and they certainly didn't know about the Holy Spirit (nor were they indwelt.) So were they believers before or after Paul told them about Jesus and laid hands on them? They were called disciples before Paul had spoken to them. Also interesting that these people were baptized twice.